BSJ-CDJ Series Digital Seismic Geophones (velocity type sensor)
  
     
     
 
  BSJ-CDJ series digital seismic geophones, in natural frequency from 1Hz to 100Hz, include vertical detector, horizontal detector, bi-component detector and tri-component detector. Universal adjusting detector and 54.7∼detector are special tri-component detector .Besides, we have bore-hole detector, tomography detector-bunch and bi-direction (vertical & horizontal) sensor.
 
     
     
 
  BSJ-CDJ mid &high-frequency series geophones＊ frequency can be 4,10,15,28,30,40,60,80 or 100Hz (with these, tri-component geophone can be configured). They are widely used to seismic prospecting of petroleum, coal, metallurgy, national defense, engineering and etc.
4-100 Hz vertical/horizontal
 
 
 
 
 
     
 
  BSJ-CDJ low-frequency series sensors' frequency is 1Hz, 2Hz, 2.5Hz or 3Hz (with these, tri-component sensor can be configured). They can be widely used in deep seismic prospecting, seism surveillance, microseismometer in engineering , surface wave survey and low frequency measurement in other fields.
 
 
 
Inserted electro-magnetic sensor
Shear wave probe
 
     
     
 
  Bore-hole geophone (shear wave probe) can be used receive seismic wave in well (diameter ranges from 60 to 110 mm and well depth is 120 meters) with piston-type or electro-magnetic wall-attached devices .Frequency can be selective from 10Hz to 100 Hz.
 
     
  MAIN SPECIFICATION OF BSJ-CDJ MID AND HIGH FREQUENCY GEOPHONE  

Name
and No.

CDJ-Z4
4hz vertical

CDJ-Z10
10hz
vertical

CDJ-Z15
15hz
vertical

CDJ-Z28
28hz
vertical

CDJ-P28
28hz
horizontal

CDJ-Z30
30hz
vertical

CDJ-P30
30hz
horizontal

CDJ-Z38
38hz
vertical

CDJ-P38
38hz
horizontal

CDJ-Z40
40hz
vertical

CDJ-p40
40hz
horizontal

CDJ-Z60
60hz
vertical

CDJ-P60
60HZ
horizontal

CDJ-Z80
80hz
vertical

CDJ-P80
80hz
horizontal

CDJ-Z100
100hz
vertical

CDJ-P100
100hz
horizontal
Specification

Natural frequency Fn( Hz)
4㊣10%
10㊣5%
15㊣5%
28㊣5%
30㊣5%
38㊣5%
40㊣5%
60㊣5%
80㊣5%
100㊣5%
Sensitivity G (V/cm.s-1)
0.28㊣5%
0.28㊣5%
0.28㊣5%
0.28㊣5%
0.28㊣5%
0.26㊣5%
0.26㊣5%
0.3㊣5%
0.25㊣5%
0.25㊣5%
Coil resisitivity
Rc (次)
365㊣5%
365㊣5%
450㊣5%
500㊣5%
500㊣5%
650㊣5%
690㊣5%
1030㊣5%
735㊣5%
1080㊣5%
Internal resistivity R(次)
365㊣5%
335㊣5%
390㊣5%
415㊣5%
415㊣5%
560㊣5%
580㊣5%
800㊣5%
685㊣5%
1020㊣5%
Damping factor
Bt
0.7㊣10%
0.58㊣10%
0.57㊣10%
0.62㊣10%
0.6㊣10%
0.6㊣10%
0.6㊣10%
0.6㊣10%
0.55㊣10%
0.5㊣10%
Misleading D
≒0.3
≒0.2
Insulance
Ri (M次)
≡20
Max. displacement of coil P-P (mm)
2
Mass of floating subject M(g)
13.2
12.8
10.5
8.6
7.9
5.9
5.5
5.2
Temperature(∼c)
-40--+70
Dimension of element
Dia.(mm)
27.2
Height(mm)
34
32
Mass(g)
85
86
78
Dimension of the case

length(mm)
50(vertical)/60(horizontal)
width(mm)
39(vertical)/50(horizontal)
Height(mm)
78(vertical)/53(horizontal) (spike not included)
Mass(d)
180
175
 
  MAIN SPECIFICATION OF BSJ-CDJ LOW FREQUENCY GEOPHONE

Namxze and No.
CDJ-Z1
1hz
vertical
CDJ-P1
1hz
horizontal
CDJ-S1
1hz
3-dimensional
CDJ-S2C
2hz
3dimensional
CDJ-Z2.5
2.5hz
vertical
CDJ-P2.5
2.5hz
horizontal
CDJ-S2.5
2.5hz 3-
dimensional
CDJ-Z3
3hz
vertical
CDJ-P3
3hz
horizontal
CDJ-S3
3hz
3-dimensional
Specification
Natural frequency Fn( Hz)
1㊣10%
2㊣10%
2.5㊣10%
3㊣10%
Sensitivity G(V/cm.s-1)
2㊣10%
2㊣10%
2㊣10%
Coil resisitivity Rc (次)
3300㊣10%
6040㊣5%
6040㊣5%
Internal resistivity(次)
3300㊣10%
5800㊣5%
5800㊣5%
Damping factor Bt
0.25㊣10%
0.7㊣10%
Misleading D
.
≒0.2
Insulance Ri (M次)
≡10
Max. displacement of coil P-P (mm)
4
.
Mass of floating subject M(g)
770.5
57.7
Temperature (∼c)
Dimension of element
Dia. (mm)
65
38.5
.
38.5
.
38.5
Height(mm)
107
50
.
50
.
50
Mass(g)
1500
265
.
265
.
265
Dimension of the case
Dia. (mm)
77
72x72
188
128
55x70
38.5
128
55x70
38.5
128
Height (mm)
140
125
160
134
86
83
134
86
83
134
Mass (d)
1.9
2
10
2.2
.
0.45
2.2
.
0.45
2.2